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Finding the Fourth Proportional to 79,343.94, 119,016.36 and 31,980.81

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Solution

The fourth proportional to 79,343.94, 119,016.36 and 31,980.81 is: 47,971.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,343.94 : 119,016.36 = 31,980.81 : x
  2. Step 2: Convert to fraction form
    79,343.94/119,016.36 = 31,980.81/x
  3. Step 3: Cross multiply
    79,343.94x = 119,016.36 × 31,980.81
  4. Step 4: Simplify right side
    79,343.94x = 3,806,239,596.05
  5. Step 5: Solve for x
    x = 3,806,239,596.05/79,343.94
  6. Step 6: Final answer
    x = 47,971.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.